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3 Keating GM, "Tiotropium bromide inhalation powder: a review of its use in the management of chronic obstructive pulmonary disease" 72 : 273-300, 2012
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6 Singh D, "Tiotropium + olodaterol shows clinically meaningful improvements in quality of life" 109 : 1312-1319, 2015
7 Walker PP, "The volumetric response to bronchodilators in stable chronic obstructive pulmonary disease" 5 : 147-152, 2008
8 Wedzicha JA, "The prevention of chronic obstructive pulmonary disease exacerbations by salmeterol/fluticasone propionate or tiotropium bromide" 177 : 19-26, 2008
9 "Spiolto Respimat in COPD [Internet]" Boehringer Ingelheim
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